chestnut vs saffron

chestnut

adj
  • Of a deep reddish-brown colour, like that of a chestnut. 

noun
  • A round or oval horny plate found on the inner side of the leg of a horse or other animal, similar to a birthmark on a human. 

  • A tree or shrub of the genus Castanea. 

  • The wood of a chestnut tree. 

  • A dark, reddish-brown colour, as seen on the fruit of the chestnut tree. 

  • A reddish-brown horse. 

  • A nut of this tree or shrub. 

  • An old joke; a worn-out meme, phrase, ploy, etc. so often repeated as to have grown tiresome or ineffective (often in the phrase "old chestnut"). 

  • The horse-chestnut. 

saffron

adj
  • Having an orange-yellow colour. 

verb
  • To add saffron to (a food), for taste, colour etc. 

  • To dye (a fabric, garment, etc.) with a saffron-based dye. 

  • To give a saffron colour to (something). 

  • To colour (a metal or wooden surface) with a gilding product containing saffron. 

  • To embellish. 

noun
  • An orange-yellow colour, the colour of a lion's pelt. 

  • A spice (seasoning) and colouring agent made from the stigma and part of the style of the plant, sometimes or formerly also used as a dye and insect repellent. 

  • The plant Crocus sativus, a crocus. 

How often have the words chestnut and saffron occurred in a corpus of books? (source: Google Ngram Viewer )